Exploiting a GSM Network for Precise Payload Delivery

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This paper introduces the novel concept of using a GSM network for command of and communications with multiple aerial delivery systems. The research prototype of such a system,
Snowflake-N, allows communicating with other network clients via a commercial Blackberry Curve 8310 handheld over a Bluetooth connection. A new architecture allows reassigning targets and sending
other relevant commands (via web interface, by voice, data, or text messages) to an onboard autopilot, which is within a network reach, from any place in the world. Similarly, a current position of the
descending system and target assignment can be viewed from any computer connected to the Internet worldwide using a standard Google Earth viewer. The networking capability also allows uplinking the
latest weather data measured by a portable target weather station, being a part of a network as well, and therefore drastically improving an accuracy of a payload delivery. The paper extends the previous
work by the authors and introduces the current state of the Snowflake-N development. It presents a C2 concept for the aerial delivery systems, talks about communication protocols, presents the hardware
set-up, components and results of recent drops. The paper ends with conclusions and recommendations for further development.

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